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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2006-09-20 15:59:22 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-09-20 15:59:22 +0200 |
| commit | 9514e2311be97a01e8669c4de78e9fea37489f09 (patch) | |
| tree | 74a256ce4ab6a94c904635f47862f8f3e3ec7974 | |
| parent | 6981e936aa156c747bb3e6aea414bba673457115 (diff) | |
| download | linux-9514e2311be97a01e8669c4de78e9fea37489f09.tar.gz | |
[S390] Kernel stack overflow handling.
Substract the size of the initial stack frame from the correct
register. Otherwise we will end up in a program check loop.
Fix the offset into the save area as well.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/kernel/entry64.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index 8b956d1538f552..29bbfbab733273 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -827,7 +827,7 @@ restart_go: */ stack_overflow: lg %r15,__LC_PANIC_STACK # change to panic stack - aghi %r1,-SP_SIZE + aghi %r15,-SP_SIZE mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack la %r1,__LC_SAVE_AREA @@ -835,7 +835,7 @@ stack_overflow: je 0f chi %r12,__LC_PGM_OLD_PSW je 0f - la %r1,__LC_SAVE_AREA+16 + la %r1,__LC_SAVE_AREA+32 0: mvc SP_R12(32,%r15),0(%r1) # move %r12-%r15 to stack xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # clear back chain la %r2,SP_PTREGS(%r15) # load pt_regs |